Portable telephone unit



FIG. 1 is a left side, top and front perspective view of a portable telephone unit showing our new design;

FIGS. 2 and 3 are respectively left and right side elevational views thereof;

FIGS. 4 and 5 are respectively front and rear elevational views thereof; and

FIGS. 6 and 7 are respectively top and bottom plan views thereof. 

The ornamental design for a portable telephone unit, as shown and described. 